41
Table 3.3 R
ange Score in Students’ Reading Interest
Scale Strongly Agree
Agree Undecided Disagree Strongly Disagree
Positive 5
4 3
2 1
Negative 1
2 3
4 5
c. Blue print
The blue print of reading interest questionnaire can be clearly seen in the following table:
Table 3.4 The Blueprint of Reading Interest Questionnaire
No Aspect Indicators
Questions Total
1. Situational
interest Spending spare time by reading
for fun Spending spare time by reading
English text Reading for fun during a trip
Reading a tale Reading some topics related to
English subject Reading for information
1, 2 3
4 7
9, 10, 11 8
2 1
1 1
3 1
2. Individual
interest Feeling bored while reading
Feeling curious before reading Feeling a positive attitude to do
reading activities Feeling enthusiastic during
reading activities Trying to figure out the troubles
when reading 5, 6
12, 14 13, 15, 16, 17,
18, 19, 23, 24 20, 21, 22
25, 26, 27, 28 2
2 8
3 4
Total number of questionnaires 28
42
a. Validation
To have valid and reliable instrument, it was important to test validity and reliability of the instruments. Firstly, validity was a
precise degree between data from the respondents and obtained data from the researcher Fraenkel, 2012. It involved the degree in which
the content domain associated with the construct. In this case, validity test was used to measure the instrument whether it is valid or invalid.
Secondly, reliability test was used to measure the consistency of measurement tool in a certain research.
1.
The Validity of Instrument
The appropriateness of the test could be achieved by using Pearson Product Moment formula to calculate the validity and Alpha
method in calculating its reliability. The formulation was in the following:
Table 3.5 The Formula of Product Moment
] .
][ .
[ .
2 2
2 2
i i
i i
i i
i i
i
Y Y
n X
X n
Y X
Y X
n r
Note :
i
r
= time score result X and Y for each respondent
X
= score of test instrument X
Y
= score of test instrument Y
2
X
= quadratic score instrument X
2
Y
= quadratic score instrument Y n = number of respondent
To judge the validity of each item could be seen from the coloumn corrected item-total correlation r
count
compared with r
table
. If r
count
r
table
that item wa s valid or otherwise using α=0.05. Based on
trying out instrument which was conducted to 35 respondents of with 28 statemen
ts related to students‟ reading interest, it was obtained that 23 statements were valid and 5 statements were invalid. It can be seen
on the table 3.7 as follows.
